Lib Gd.inc.php:
<?php // $Revision: 2.0.2.3 $
/************************************************************************/
/* phpPgAds */
/* ======== */
/* */
/* Copyright (c) 2001-2005 by the phpPgAds developers */
/* For more information visit: http://phppgads.sourceforge.net */
/* */
/* This program is free software. You can redistribute it and/or modify */
/* it under the terms of the GNU General Public License as published by */
/* the Free Software Foundation; either version 2 of the License. */
/************************************************************************/
// Define defaults
$phpAds_GDImageFormat = '';
/*********************************************************/
/* Determine the image format supported by GD */
/*********************************************************/
function phpAds_GDImageFormat()
{
global $phpAds_config;
global $phpAds_GDImageFormat;
// Determine php version
$phpversion = ereg_replace ("([^0-9])", "", phpversion());
$phpversion = $phpversion / pow (10, strlen($phpversion) - 1);
if ($phpversion >= 4.02 || ($phpversion >= 3.018 && $phpversion < 4.0))
{
// Determine if GD is installed
if (extension_loaded("gd"))
{
// Use ImageTypes() to dermine image format
if (ImageTypes() & IMG_PNG)
$phpAds_GDImageFormat = "png";
elseif (ImageTypes() & IMG_JPG)
$phpAds_GDImageFormat = "jpeg";
elseif (ImageTypes() & IMG_GIF)
$phpAds_GDImageFormat = "gif";
else
$phpAds_GDImageFormat = "none";
}
else
$phpAds_GDImageFormat = "none";
}
elseif ($phpversion >= 4)
{
// No way to determine image format
$phpAds_GDImageFormat = "gif"; // assume gif?
}
else
{
// Use Function_Exists to determine image format
if (function_exists("imagepng"))
$phpAds_GDImageFormat = "png";
elseif (function_exists("imagejpeg"))
$phpAds_GDImageFormat = "jpeg";
elseif (function_exists("imagegif"))
$phpAds_GDImageFormat = "gif";
else
$phpAds_GDImageFormat = "none";
}
// Override detected GD foramt
if (isset($phpAds_config['override_gd_imageformat']) && $phpAds_config['override_gd_imageformat'] != '')
$phpAds_GDImageFormat = $phpAds_config['override_gd_imageformat'];
return ($phpAds_GDImageFormat);
}
/*********************************************************/
/* Send the correct Content-type header */
/*********************************************************/
function phpAds_GDContentType()
{
global $phpAds_GDImageFormat;
if ($phpAds_GDImageFormat == '') $phpAds_GDImageFormat = phpAds_GDImageFormat();
Header("Content-type: $phpAds_GDImageFormat");
}
/*********************************************************/
/* Send the image to the browser in the correct format */
/*********************************************************/
function phpAds_GDShowImage(&$im)
{
global $phpAds_GDImageFormat;
if ($phpAds_GDImageFormat == '') $phpAds_GDImageFormat = phpAds_GDImageFormat();
switch ($phpAds_GDImageFormat)
{
case "gif":
ImageGIF($im);
break;
case "jpeg":
ImageJPEG($im);
break;
case "png":
ImagePNG($im);
break;
default:
break; // No GD installed
}
}
?>
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